Event-related functional magnetic resonance imaging
Event-related functional magnetic resonance imaging (efMRI) is a form of functional Magnetic Resonance Imaging (fMRI) in which a series of fMRI images are time-locked to a stimulus presentation and averaged together. The relationship of the technique to fMRI is analogous to the relationship between ERP (Event-Related Potential) data and EEG (Electroencephalogram) data. Some have suggested using this technique in conjunction with ERP measurements to localize the structural origins of an ERP wave.
Rossell, S.L., Prince, CJ, Nobre, A.C. (2003). The anatomy and time course of semantic priming investigated by fMRI and ERPs. Neuropsychologia, 41, 550-564.